1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
23 /* This is the top level of cc1/c++.
24 It parses command args, opens files, invokes the various passes
25 in the proper order, and counts the time used by each.
26 Error messages and low-level interface to malloc also handled here. */
29 #undef FLOAT /* This is for hpux. They should change hpux. */
30 #undef FFS /* Some systems define this in param.h. */
32 #include "coretypes.h"
36 #ifdef HAVE_SYS_RESOURCE_H
37 # include <sys/resource.h>
40 #ifdef HAVE_SYS_TIMES_H
41 # include <sys/times.h>
51 #include "insn-attr.h"
52 #include "insn-config.h"
53 #include "insn-flags.h"
54 #include "hard-reg-set.h"
61 #include "basic-block.h"
67 #include "diagnostic.h"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
86 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
87 #include "dwarf2out.h"
90 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
94 #ifdef SDB_DEBUGGING_INFO
98 #ifdef XCOFF_DEBUGGING_INFO
99 #include "xcoffout.h" /* Needed for external data
100 declarations for e.g. AIX 4.x. */
103 static void general_init (const char *);
104 static void do_compile (void);
105 static void process_options (void);
106 static void backend_init (void);
107 static int lang_dependent_init (const char *);
108 static void init_asm_output (const char *);
109 static void finalize (void);
111 static void crash_signal (int) ATTRIBUTE_NORETURN;
112 static void setup_core_dumping (void);
113 static void compile_file (void);
115 /* Nonzero to dump debug info whilst parsing (-dy option). */
116 static int set_yydebug;
118 /* True if we don't need a backend (e.g. preprocessing only). */
119 static bool no_backend;
121 /* Length of line when printing switch values. */
124 /* Name of program invoked, sans directories. */
126 const char *progname;
128 /* Copy of argument vector to toplev_main. */
129 static const char **save_argv;
131 /* Name of top-level original source file (what was input to cpp).
132 This comes from the #-command at the beginning of the actual input.
133 If there isn't any there, then this is the cc1 input file name. */
135 const char *main_input_filename;
137 #ifndef USE_MAPPED_LOCATION
138 location_t unknown_location = { NULL, 0 };
141 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
142 to optimize and default_debug_hooks in process_options (). */
143 #define AUTODETECT_VALUE 2
145 /* Current position in real source file. */
147 location_t input_location;
149 struct line_maps line_table;
151 /* Nonzero if it is unsafe to create any new pseudo registers. */
154 /* Stack of currently pending input files. */
156 struct file_stack *input_file_stack;
158 /* Incremented on each change to input_file_stack. */
159 int input_file_stack_tick;
161 /* Record of input_file_stack at each tick. */
162 typedef struct file_stack *fs_p;
164 DEF_VEC_ALLOC_P(fs_p,heap);
165 static VEC(fs_p,heap) *input_file_stack_history;
167 /* Whether input_file_stack has been restored to a previous state (in
168 which case there should be no more pushing). */
169 static bool input_file_stack_restored;
171 /* Name to use as base of names for dump output files. */
173 const char *dump_base_name;
175 /* Name to use as a base for auxiliary output files. */
177 const char *aux_base_name;
179 /* Bit flags that specify the machine subtype we are compiling for.
180 Bits are tested using macros TARGET_... defined in the tm.h file
181 and set by `-m...' switches. Must be defined in rtlanal.c. */
183 extern int target_flags;
185 /* A mask of target_flags that includes bit X if X was set or cleared
186 on the command line. */
188 int target_flags_explicit;
190 /* Debug hooks - dependent upon command line options. */
192 const struct gcc_debug_hooks *debug_hooks;
194 /* Debug hooks - target default. */
196 static const struct gcc_debug_hooks *default_debug_hooks;
198 /* Other flags saying which kinds of debugging dump have been requested. */
200 int rtl_dump_and_exit;
201 int flag_print_asm_name;
202 enum graph_dump_types graph_dump_format;
204 /* Name for output file of assembly code, specified with -o. */
206 const char *asm_file_name;
208 /* Nonzero means do optimizations. -O.
209 Particular numeric values stand for particular amounts of optimization;
210 thus, -O2 stores 2 here. However, the optimizations beyond the basic
211 ones are not controlled directly by this variable. Instead, they are
212 controlled by individual `flag_...' variables that are defaulted
213 based on this variable. */
217 /* Nonzero means optimize for size. -Os.
218 The only valid values are zero and nonzero. When optimize_size is
219 nonzero, optimize defaults to 2, but certain individual code
220 bloating optimizations are disabled. */
222 int optimize_size = 0;
224 /* The FUNCTION_DECL for the function currently being compiled,
225 or 0 if between functions. */
226 tree current_function_decl;
228 /* Set to the FUNC_BEGIN label of the current function, or NULL
230 const char * current_function_func_begin_label;
232 /* Temporarily suppress certain warnings.
233 This is set while reading code from a system header file. */
235 int in_system_header = 0;
237 /* Nonzero means to collect statistics which might be expensive
238 and to print them when we are done. */
239 int flag_detailed_statistics = 0;
241 /* A random sequence of characters, unless overridden by user. */
242 const char *flag_random_seed;
244 /* A local time stamp derived from the time of compilation. It will be
245 zero if the system cannot provide a time. It will be -1u, if the
246 user has specified a particular random seed. */
251 /* Nonzero means `char' should be signed. */
253 int flag_signed_char;
255 /* Nonzero means give an enum type only as many bytes as it needs. A value
256 of 2 means it has not yet been initialized. */
258 int flag_short_enums;
260 /* Nonzero if structures and unions should be returned in memory.
262 This should only be defined if compatibility with another compiler or
263 with an ABI is needed, because it results in slower code. */
265 #ifndef DEFAULT_PCC_STRUCT_RETURN
266 #define DEFAULT_PCC_STRUCT_RETURN 1
269 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
271 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
273 /* 0 means straightforward implementation of complex divide acceptable.
274 1 means wide ranges of inputs must work for complex divide.
275 2 means C99-like requirements for complex multiply and divide. */
277 int flag_complex_method = 1;
279 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
280 not just because the tree inliner turned us off. */
282 int flag_really_no_inline = 2;
284 /* Nonzero means we should be saving declaration info into a .X file. */
286 int flag_gen_aux_info = 0;
288 /* Specified name of aux-info file. */
290 const char *aux_info_file_name;
292 /* Nonzero if we are compiling code for a shared library, zero for
297 /* Generate code for GNU or NeXT Objective-C runtime environment. */
299 #ifdef NEXT_OBJC_RUNTIME
300 int flag_next_runtime = 1;
302 int flag_next_runtime = 0;
305 /* Set to the default thread-local storage (tls) model to use. */
307 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
309 /* Nonzero means change certain warnings into errors.
310 Usually these are warnings about failure to conform to some standard. */
312 int flag_pedantic_errors = 0;
314 /* -dA causes debug commentary information to be produced in
315 the generated assembly code (to make it more readable). This option
316 is generally only of use to those who actually need to read the
317 generated assembly code (perhaps while debugging the compiler itself).
318 Currently, this switch is only used by dwarfout.c; however, it is intended
319 to be a catchall for printing debug information in the assembler file. */
321 int flag_debug_asm = 0;
323 /* -dP causes the rtl to be emitted as a comment in assembly. */
325 int flag_dump_rtl_in_asm = 0;
327 /* When non-NULL, indicates that whenever space is allocated on the
328 stack, the resulting stack pointer must not pass this
329 address---that is, for stacks that grow downward, the stack pointer
330 must always be greater than or equal to this address; for stacks
331 that grow upward, the stack pointer must be less than this address.
332 At present, the rtx may be either a REG or a SYMBOL_REF, although
333 the support provided depends on the backend. */
336 /* If one, renumber instruction UIDs to reduce the number of
337 unused UIDs if there are a lot of instructions. If greater than
338 one, unconditionally renumber instruction UIDs. */
339 int flag_renumber_insns = 1;
341 /* Nonzero if we should track variables. When
342 flag_var_tracking == AUTODETECT_VALUE it will be set according
343 to optimize, debug_info_level and debug_hooks in process_options (). */
344 int flag_var_tracking = AUTODETECT_VALUE;
346 /* True if the user has tagged the function with the 'section'
349 bool user_defined_section_attribute = false;
351 /* Values of the -falign-* flags: how much to align labels in code.
352 0 means `use default', 1 means `don't align'.
353 For each variable, there is an _log variant which is the power
354 of two not less than the variable, for .align output. */
357 int align_loops_max_skip;
359 int align_jumps_max_skip;
360 int align_labels_log;
361 int align_labels_max_skip;
362 int align_functions_log;
364 /* Like align_functions_log above, but used by front-ends to force the
365 minimum function alignment. Zero means no alignment is forced. */
366 int force_align_functions_log;
370 const char *const string;
374 lang_independent_options;
376 /* Nonzero if subexpressions must be evaluated from left-to-right. */
377 int flag_evaluation_order = 0;
379 /* The user symbol prefix after having resolved same. */
380 const char *user_label_prefix;
382 static const param_info lang_independent_params[] = {
383 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
384 { OPTION, DEFAULT, false, MIN, MAX, HELP },
385 #include "params.def"
387 { NULL, 0, false, 0, 0, NULL }
390 /* Output files for assembler code (real compiler output)
391 and debugging dumps. */
395 FILE *dump_file = NULL;
396 const char *dump_file_name;
398 /* The current working directory of a translation. It's generally the
399 directory from which compilation was initiated, but a preprocessed
400 file may specify the original directory in which it was
403 static const char *src_pwd;
405 /* Initialize src_pwd with the given string, and return true. If it
406 was already initialized, return false. As a special case, it may
407 be called with a NULL argument to test whether src_pwd has NOT been
411 set_src_pwd (const char *pwd)
415 if (strcmp (src_pwd, pwd) == 0)
421 src_pwd = xstrdup (pwd);
425 /* Return the directory from which the translation unit was initiated,
426 in case set_src_pwd() was not called before to assign it a
442 /* Called when the start of a function definition is parsed,
443 this function prints on stderr the name of the function. */
445 announce_function (tree decl)
449 if (rtl_dump_and_exit)
450 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
452 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
454 pp_needs_newline (global_dc->printer) = true;
455 diagnostic_set_last_function (global_dc);
459 /* Set up a default flag_random_seed and local_tick, unless the user
460 already specified one. */
465 if (!flag_random_seed)
467 unsigned HOST_WIDE_INT value;
468 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
470 /* Get some more or less random data. */
471 #ifdef HAVE_GETTIMEOFDAY
475 gettimeofday (&tv, NULL);
476 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
480 time_t now = time (NULL);
482 if (now != (time_t)-1)
483 local_tick = (unsigned) now;
486 value = local_tick ^ getpid ();
488 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
489 flag_random_seed = random_seed;
491 else if (!local_tick)
496 /* Decode the string P as an integral parameter.
497 If the string is indeed an integer return its numeric value else
498 issue an Invalid Option error for the option PNAME and return DEFVAL.
499 If PNAME is zero just return DEFVAL, do not call error. */
502 read_integral_parameter (const char *p, const char *pname, const int defval)
504 const char *endp = p;
517 error ("invalid option argument %qs", pname);
524 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
525 for floor_log2 and exact_log2; see toplev.h. That construct, however,
526 conflicts with the ISO C++ One Definition Rule. */
528 #if GCC_VERSION < 3004 || !defined (__cplusplus)
530 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
531 If X is 0, return -1. */
534 floor_log2 (unsigned HOST_WIDE_INT x)
542 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
544 if (HOST_BITS_PER_WIDE_INT > 64)
545 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
547 if (HOST_BITS_PER_WIDE_INT > 32)
548 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
550 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
552 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
554 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
556 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
558 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
565 /* Return the logarithm of X, base 2, considering X unsigned,
566 if X is a power of 2. Otherwise, returns -1. */
569 exact_log2 (unsigned HOST_WIDE_INT x)
574 return x ? CTZ_HWI (x) : -1;
576 return floor_log2 (x);
580 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
582 /* Handler for fatal signals, such as SIGSEGV. These are transformed
583 into ICE messages, which is much more user friendly. In case the
584 error printer crashes, reset the signal to prevent infinite recursion. */
587 crash_signal (int signo)
589 signal (signo, SIG_DFL);
591 /* If we crashed while processing an ASM statement, then be a little more
592 graceful. It's most likely the user's fault. */
593 if (this_is_asm_operands)
595 output_operand_lossage ("unrecoverable error");
596 exit (FATAL_EXIT_CODE);
599 internal_error ("%s", strsignal (signo));
602 /* Arrange to dump core on error. (The regular error message is still
603 printed first, except in the case of abort().) */
606 setup_core_dumping (void)
609 signal (SIGABRT, SIG_DFL);
611 #if defined(HAVE_SETRLIMIT)
614 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
615 fatal_error ("getting core file size maximum limit: %m");
616 rlim.rlim_cur = rlim.rlim_max;
617 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
618 fatal_error ("setting core file size limit to maximum: %m");
621 diagnostic_abort_on_error (global_dc);
625 /* Strip off a legitimate source ending from the input string NAME of
626 length LEN. Rather than having to know the names used by all of
627 our front ends, we strip off an ending of a period followed by
628 up to five characters. (Java uses ".class".) */
631 strip_off_ending (char *name, int len)
634 for (i = 2; i < 6 && len > i; i++)
636 if (name[len - i] == '.')
638 name[len - i] = '\0';
644 /* Output a quoted string. */
647 output_quoted_string (FILE *asm_file, const char *string)
649 #ifdef OUTPUT_QUOTED_STRING
650 OUTPUT_QUOTED_STRING (asm_file, string);
654 putc ('\"', asm_file);
655 while ((c = *string++) != 0)
659 if (c == '\"' || c == '\\')
660 putc ('\\', asm_file);
664 fprintf (asm_file, "\\%03o", (unsigned char) c);
666 putc ('\"', asm_file);
670 /* Output a file name in the form wanted by System V. */
673 output_file_directive (FILE *asm_file, const char *input_name)
678 if (input_name == NULL)
679 input_name = "<stdin>";
681 len = strlen (input_name);
682 na = input_name + len;
684 /* NA gets INPUT_NAME sans directory names. */
685 while (na > input_name)
687 if (IS_DIR_SEPARATOR (na[-1]))
692 #ifdef ASM_OUTPUT_SOURCE_FILENAME
693 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
695 fprintf (asm_file, "\t.file\t");
696 output_quoted_string (asm_file, na);
697 fputc ('\n', asm_file);
701 /* A subroutine of wrapup_global_declarations. We've come to the end of
702 the compilation unit. All deferred variables should be undeferred,
703 and all incomplete decls should be finalized. */
706 wrapup_global_declaration_1 (tree decl)
708 /* We're not deferring this any longer. Assignment is conditional to
709 avoid needlessly dirtying PCH pages. */
710 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
711 && DECL_DEFER_OUTPUT (decl) != 0)
712 DECL_DEFER_OUTPUT (decl) = 0;
714 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
715 lang_hooks.finish_incomplete_decl (decl);
718 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
719 needs to be output. Return true if it is output. */
722 wrapup_global_declaration_2 (tree decl)
724 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
727 /* Don't write out static consts, unless we still need them.
729 We also keep static consts if not optimizing (for debugging),
730 unless the user specified -fno-keep-static-consts.
731 ??? They might be better written into the debug information.
732 This is possible when using DWARF.
734 A language processor that wants static constants to be always
735 written out (even if it is not used) is responsible for
736 calling rest_of_decl_compilation itself. E.g. the C front-end
737 calls rest_of_decl_compilation from finish_decl.
738 One motivation for this is that is conventional in some
739 environments to write things like:
740 static const char rcsid[] = "... version string ...";
741 intending to force the string to be in the executable.
743 A language processor that would prefer to have unneeded
744 static constants "optimized away" would just defer writing
745 them out until here. E.g. C++ does this, because static
746 constants are often defined in header files.
748 ??? A tempting alternative (for both C and C++) would be
749 to force a constant to be written if and only if it is
750 defined in a main file, as opposed to an include file. */
752 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
754 struct varpool_node *node;
756 node = varpool_node (decl);
760 else if (node->alias)
762 else if (!cgraph_global_info_ready
764 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
766 else if (node->needed)
768 else if (DECL_COMDAT (decl))
770 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
771 && (optimize || !flag_keep_static_consts
772 || DECL_ARTIFICIAL (decl)))
777 rest_of_decl_compilation (decl, 1, 1);
785 /* Do any final processing required for the declarations in VEC, of
786 which there are LEN. We write out inline functions and variables
787 that have been deferred until this point, but which are required.
788 Returns nonzero if anything was put out. */
791 wrapup_global_declarations (tree *vec, int len)
793 bool reconsider, output_something = false;
796 for (i = 0; i < len; i++)
797 wrapup_global_declaration_1 (vec[i]);
799 /* Now emit any global variables or functions that we have been
800 putting off. We need to loop in case one of the things emitted
801 here references another one which comes earlier in the list. */
805 for (i = 0; i < len; i++)
806 reconsider |= wrapup_global_declaration_2 (vec[i]);
808 output_something = true;
812 return output_something;
815 /* A subroutine of check_global_declarations. Issue appropriate warnings
816 for the global declaration DECL. */
819 check_global_declaration_1 (tree decl)
821 /* Warn about any function declared static but not defined. We don't
822 warn about variables, because many programs have static variables
823 that exist only to get some text into the object file. */
824 if (TREE_CODE (decl) == FUNCTION_DECL
825 && DECL_INITIAL (decl) == 0
826 && DECL_EXTERNAL (decl)
827 && ! DECL_ARTIFICIAL (decl)
828 && ! TREE_NO_WARNING (decl)
829 && ! TREE_PUBLIC (decl)
830 && (warn_unused_function
831 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
833 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
834 pedwarn ("%q+F used but never defined", decl);
836 warning (0, "%q+F declared %<static%> but never defined", decl);
837 /* This symbol is effectively an "extern" declaration now. */
838 TREE_PUBLIC (decl) = 1;
839 assemble_external (decl);
842 /* Warn about static fns or vars defined but not used. */
843 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
844 /* We don't warn about "static const" variables because the
845 "rcs_id" idiom uses that construction. */
846 || (warn_unused_variable
847 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
848 && ! DECL_IN_SYSTEM_HEADER (decl)
849 && ! TREE_USED (decl)
850 /* The TREE_USED bit for file-scope decls is kept in the identifier,
851 to handle multiple external decls in different scopes. */
852 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
853 && ! DECL_EXTERNAL (decl)
854 && ! TREE_PUBLIC (decl)
855 /* A volatile variable might be used in some non-obvious way. */
856 && ! TREE_THIS_VOLATILE (decl)
857 /* Global register variables must be declared to reserve them. */
858 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
859 /* Otherwise, ask the language. */
860 && lang_hooks.decls.warn_unused_global (decl))
861 warning (0, "%q+D defined but not used", decl);
864 /* Issue appropriate warnings for the global declarations in VEC (of
865 which there are LEN). */
868 check_global_declarations (tree *vec, int len)
872 for (i = 0; i < len; i++)
873 check_global_declaration_1 (vec[i]);
876 /* Emit debugging information for all global declarations in VEC. */
879 emit_debug_global_declarations (tree *vec, int len)
883 /* Avoid confusing the debug information machinery when there are errors. */
884 if (errorcount != 0 || sorrycount != 0)
887 timevar_push (TV_SYMOUT);
888 for (i = 0; i < len; i++)
889 debug_hooks->global_decl (vec[i]);
890 timevar_pop (TV_SYMOUT);
893 /* Warn about a use of an identifier which was marked deprecated. */
895 warn_deprecated_use (tree node)
897 if (node == 0 || !warn_deprecated_decl)
902 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
903 warning (OPT_Wdeprecated_declarations,
904 "%qs is deprecated (declared at %s:%d)",
905 IDENTIFIER_POINTER (DECL_NAME (node)),
906 xloc.file, xloc.line);
908 else if (TYPE_P (node))
910 const char *what = NULL;
911 tree decl = TYPE_STUB_DECL (node);
913 if (TYPE_NAME (node))
915 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
916 what = IDENTIFIER_POINTER (TYPE_NAME (node));
917 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
918 && DECL_NAME (TYPE_NAME (node)))
919 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
924 expanded_location xloc
925 = expand_location (DECL_SOURCE_LOCATION (decl));
927 warning (OPT_Wdeprecated_declarations,
928 "%qs is deprecated (declared at %s:%d)", what,
929 xloc.file, xloc.line);
931 warning (OPT_Wdeprecated_declarations,
932 "type is deprecated (declared at %s:%d)",
933 xloc.file, xloc.line);
938 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
940 warning (OPT_Wdeprecated_declarations, "type is deprecated");
945 /* Save the current INPUT_LOCATION on the top entry in the
946 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
947 INPUT_LOCATION accordingly. */
950 #ifdef USE_MAPPED_LOCATION
951 push_srcloc (location_t fline)
953 push_srcloc (const char *file, int line)
956 struct file_stack *fs;
958 gcc_assert (!input_file_stack_restored);
959 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
960 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
962 fs = XNEW (struct file_stack);
963 fs->location = input_location;
964 fs->next = input_file_stack;
965 #ifdef USE_MAPPED_LOCATION
966 input_location = fline;
968 input_filename = file;
971 input_file_stack = fs;
972 input_file_stack_tick++;
973 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
976 /* Pop the top entry off the stack of presently open source files.
977 Restore the INPUT_LOCATION from the new topmost entry on the
983 struct file_stack *fs;
985 gcc_assert (!input_file_stack_restored);
986 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
987 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
989 fs = input_file_stack;
990 input_location = fs->location;
991 input_file_stack = fs->next;
992 input_file_stack_tick++;
993 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
996 /* Restore the input file stack to its state as of TICK, for the sake
997 of diagnostics after processing the whole input. Once this has
998 been called, push_srcloc and pop_srcloc may no longer be
1001 restore_input_file_stack (int tick)
1004 input_file_stack = NULL;
1006 input_file_stack = VEC_index (fs_p, input_file_stack_history, tick - 1);
1007 input_file_stack_tick = tick;
1008 input_file_stack_restored = true;
1011 /* Compile an entire translation unit. Write a file of assembly
1012 output and various debugging dumps. */
1017 /* Initialize yet another pass. */
1020 init_final (main_input_filename);
1021 coverage_init (aux_base_name);
1023 timevar_push (TV_PARSE);
1025 /* Call the parser, which parses the entire file (calling
1026 rest_of_compilation for each function). */
1027 lang_hooks.parse_file (set_yydebug);
1029 /* In case there were missing block closers,
1030 get us back to the global binding level. */
1031 lang_hooks.clear_binding_stack ();
1033 /* Compilation is now finished except for writing
1034 what's left of the symbol table output. */
1035 timevar_pop (TV_PARSE);
1037 if (flag_syntax_only)
1040 lang_hooks.decls.final_write_globals ();
1042 if (errorcount || sorrycount)
1045 varpool_assemble_pending_decls ();
1046 finish_aliases_2 ();
1048 /* This must occur after the loop to output deferred functions.
1049 Else the coverage initializer would not be emitted if all the
1050 functions in this compilation unit were deferred. */
1053 /* Likewise for mudflap static object registrations. */
1055 mudflap_finish_file ();
1057 output_shared_constant_pool ();
1058 output_object_blocks ();
1060 /* Write out any pending weak symbol declarations. */
1064 /* Do dbx symbols. */
1065 timevar_push (TV_SYMOUT);
1067 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1068 if (dwarf2out_do_frame ())
1069 dwarf2out_frame_finish ();
1072 (*debug_hooks->finish) (main_input_filename);
1073 timevar_pop (TV_SYMOUT);
1075 /* Output some stuff at end of file if nec. */
1077 dw2_output_indirect_constants ();
1079 /* Flush any pending external directives. cgraph did this for
1080 assemble_external calls from the front end, but the RTL
1081 expander can also generate them. */
1082 process_pending_assemble_externals ();
1084 /* Attach a special .ident directive to the end of the file to identify
1085 the version of GCC which compiled this code. The format of the .ident
1086 string is patterned after the ones produced by native SVR4 compilers. */
1089 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1090 IDENT_ASM_OP, version_string);
1093 /* This must be at the end. Some target ports emit end of file directives
1094 into the assembly file here, and hence we can not output anything to the
1095 assembly file after this point. */
1096 targetm.asm_out.file_end ();
1099 /* Parse a -d... command line switch. */
1102 decode_d_option (const char *arg)
1113 flag_print_asm_name = 1;
1116 flag_dump_rtl_in_asm = 1;
1117 flag_print_asm_name = 1;
1120 graph_dump_format = vcg;
1123 rtl_dump_and_exit = 1;
1128 case 'D': /* These are handled by the preprocessor. */
1132 setup_core_dumping();
1137 if (!enable_rtl_dump_file (c))
1138 warning (0, "unrecognized gcc debugging option: %c", c);
1143 /* Indexed by enum debug_info_type. */
1144 const char *const debug_type_names[] =
1146 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1149 /* Print version information to FILE.
1150 Each line begins with INDENT (for the case where FILE is the
1151 assembler output file). */
1154 print_version (FILE *file, const char *indent)
1156 static const char fmt1[] =
1158 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n")
1160 N_("%s%s%s version %s (%s) compiled by CC.\n")
1163 static const char fmt2[] =
1164 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1166 #define __VERSION__ "[?]"
1169 file == stderr ? _(fmt1) : fmt1,
1170 indent, *indent != 0 ? " " : "",
1171 lang_hooks.name, version_string, TARGET_NAME,
1172 indent, __VERSION__);
1174 file == stderr ? _(fmt2) : fmt2,
1175 indent, *indent != 0 ? " " : "",
1176 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1179 #ifdef ASM_COMMENT_START
1181 print_to_asm_out_file (print_switch_type type, const char * text)
1183 bool prepend_sep = true;
1187 case SWITCH_TYPE_LINE_END:
1188 putc ('\n', asm_out_file);
1191 case SWITCH_TYPE_LINE_START:
1192 fputs (ASM_COMMENT_START, asm_out_file);
1193 return strlen (ASM_COMMENT_START);
1195 case SWITCH_TYPE_DESCRIPTIVE:
1196 if (ASM_COMMENT_START[0] == 0)
1197 prepend_sep = false;
1199 case SWITCH_TYPE_PASSED:
1200 case SWITCH_TYPE_ENABLED:
1202 fputc (' ', asm_out_file);
1203 fprintf (asm_out_file, text);
1204 /* No need to return the length here as
1205 print_single_switch has already done it. */
1215 print_to_stderr (print_switch_type type, const char * text)
1219 case SWITCH_TYPE_LINE_END:
1220 putc ('\n', stderr);
1223 case SWITCH_TYPE_LINE_START:
1226 case SWITCH_TYPE_PASSED:
1227 case SWITCH_TYPE_ENABLED:
1228 fputc (' ', stderr);
1231 case SWITCH_TYPE_DESCRIPTIVE:
1232 fprintf (stderr, text);
1233 /* No need to return the length here as
1234 print_single_switch has already done it. */
1242 /* Print an option value and return the adjusted position in the line.
1243 ??? print_fn doesn't handle errors, eg disk full; presumably other
1244 code will catch a disk full though. */
1247 print_single_switch (print_switch_fn_type print_fn,
1249 print_switch_type type,
1252 /* The ultrix fprintf returns 0 on success, so compute the result
1253 we want here since we need it for the following test. The +1
1254 is for the seperator character that will probably be emitted. */
1255 int len = strlen (text) + 1;
1258 && pos + len > MAX_LINE)
1260 print_fn (SWITCH_TYPE_LINE_END, NULL);
1265 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1267 print_fn (type, text);
1271 /* Print active target switches using PRINT_FN.
1272 POS is the current cursor position and MAX is the size of a "line".
1273 Each line begins with INDENT and ends with TERM.
1274 Each switch is separated from the next by SEP. */
1277 print_switch_values (print_switch_fn_type print_fn)
1283 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1284 that it can be printed below. This helps reproducibility. */
1287 /* Print the options as passed. */
1288 pos = print_single_switch (print_fn, pos,
1289 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1291 for (p = &save_argv[1]; *p != NULL; p++)
1296 if (strcmp (*p, "-o") == 0
1297 || strcmp (*p, "-dumpbase") == 0
1298 || strcmp (*p, "-auxbase") == 0)
1305 if (strcmp (*p, "-quiet") == 0
1306 || strcmp (*p, "-version") == 0)
1313 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1317 print_fn (SWITCH_TYPE_LINE_END, NULL);
1319 /* Print the -f and -m options that have been enabled.
1320 We don't handle language specific options but printing argv
1322 pos = print_single_switch (print_fn, 0,
1323 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1325 for (j = 0; j < cl_options_count; j++)
1326 if ((cl_options[j].flags & CL_REPORT)
1327 && option_enabled (j) > 0)
1328 pos = print_single_switch (print_fn, pos,
1329 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1331 print_fn (SWITCH_TYPE_LINE_END, NULL);
1334 /* Open assembly code output file. Do this even if -fsyntax-only is
1335 on, because then the driver will have provided the name of a
1336 temporary file or bit bucket for us. NAME is the file specified on
1337 the command line, possibly NULL. */
1339 init_asm_output (const char *name)
1341 if (name == NULL && asm_file_name == 0)
1342 asm_out_file = stdout;
1345 if (asm_file_name == 0)
1347 int len = strlen (dump_base_name);
1348 char *dumpname = XNEWVEC (char, len + 6);
1350 memcpy (dumpname, dump_base_name, len + 1);
1351 strip_off_ending (dumpname, len);
1352 strcat (dumpname, ".s");
1353 asm_file_name = dumpname;
1355 if (!strcmp (asm_file_name, "-"))
1356 asm_out_file = stdout;
1358 asm_out_file = fopen (asm_file_name, "w+b");
1359 if (asm_out_file == 0)
1360 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1363 if (!flag_syntax_only)
1365 targetm.asm_out.file_start ();
1367 if (flag_record_gcc_switches)
1369 if (targetm.asm_out.record_gcc_switches)
1371 /* Let the target know that we are about to start recording. */
1372 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1374 /* Now record the switches. */
1375 print_switch_values (targetm.asm_out.record_gcc_switches);
1376 /* Let the target know that the recording is over. */
1377 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1381 inform ("-frecord-gcc-switches is not supported by the current target");
1384 #ifdef ASM_COMMENT_START
1385 if (flag_verbose_asm)
1387 /* Print the list of switches in effect
1388 into the assembler file as comments. */
1389 print_version (asm_out_file, ASM_COMMENT_START);
1390 print_switch_values (print_to_asm_out_file);
1391 fprintf (asm_out_file, "\n");
1397 /* Return true if the state of option OPTION should be stored in PCH files
1398 and checked by default_pch_valid_p. Store the option's current state
1402 option_affects_pch_p (int option, struct cl_option_state *state)
1404 if ((cl_options[option].flags & CL_TARGET) == 0)
1406 if (cl_options[option].flag_var == &target_flags)
1407 if (targetm.check_pch_target_flags)
1409 return get_option_state (option, state);
1412 /* Default version of get_pch_validity.
1413 By default, every flag difference is fatal; that will be mostly right for
1414 most targets, but completely right for very few. */
1417 default_get_pch_validity (size_t *len)
1419 struct cl_option_state state;
1424 if (targetm.check_pch_target_flags)
1425 *len += sizeof (target_flags);
1426 for (i = 0; i < cl_options_count; i++)
1427 if (option_affects_pch_p (i, &state))
1430 result = r = XNEWVEC (char, *len);
1434 if (targetm.check_pch_target_flags)
1436 memcpy (r, &target_flags, sizeof (target_flags));
1437 r += sizeof (target_flags);
1440 for (i = 0; i < cl_options_count; i++)
1441 if (option_affects_pch_p (i, &state))
1443 memcpy (r, state.data, state.size);
1450 /* Return a message which says that a PCH file was created with a different
1451 setting of OPTION. */
1454 pch_option_mismatch (const char *option)
1458 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1460 return _("out of memory");
1464 /* Default version of pch_valid_p. */
1467 default_pch_valid_p (const void *data_p, size_t len)
1469 struct cl_option_state state;
1470 const char *data = (const char *)data_p;
1473 /* -fpic and -fpie also usually make a PCH invalid. */
1474 if (data[0] != flag_pic)
1475 return _("created and used with different settings of -fpic");
1476 if (data[1] != flag_pie)
1477 return _("created and used with different settings of -fpie");
1480 /* Check target_flags. */
1481 if (targetm.check_pch_target_flags)
1486 memcpy (&tf, data, sizeof (target_flags));
1487 data += sizeof (target_flags);
1488 len -= sizeof (target_flags);
1489 r = targetm.check_pch_target_flags (tf);
1494 for (i = 0; i < cl_options_count; i++)
1495 if (option_affects_pch_p (i, &state))
1497 if (memcmp (data, state.data, state.size) != 0)
1498 return pch_option_mismatch (cl_options[i].opt_text);
1506 /* Default tree printer. Handles declarations only. */
1508 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1509 int precision, bool wide, bool set_locus, bool hash)
1513 /* FUTURE: %+x should set the locus. */
1514 if (precision != 0 || wide || hash)
1520 t = va_arg (*text->args_ptr, tree);
1521 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1522 t = DECL_DEBUG_EXPR (t);
1527 t = va_arg (*text->args_ptr, tree);
1534 if (set_locus && text->locus)
1535 *text->locus = DECL_SOURCE_LOCATION (t);
1539 const char *n = DECL_NAME (t)
1540 ? lang_hooks.decl_printable_name (t, 2)
1545 dump_generic_node (pp, t, 0, 0, 0);
1550 /* Initialization of the front end environment, before command line
1551 options are parsed. Signal handlers, internationalization etc.
1552 ARGV0 is main's argv[0]. */
1554 general_init (const char *argv0)
1558 p = argv0 + strlen (argv0);
1559 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1563 xmalloc_set_program_name (progname);
1567 /* Unlock the stdio streams. */
1568 unlock_std_streams ();
1570 gcc_init_libintl ();
1572 /* Initialize the diagnostics reporting machinery, so option parsing
1573 can give warnings and errors. */
1574 diagnostic_initialize (global_dc);
1575 /* Set a default printer. Language specific initializations will
1576 override it later. */
1577 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1579 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1581 signal (SIGSEGV, crash_signal);
1584 signal (SIGILL, crash_signal);
1587 signal (SIGBUS, crash_signal);
1590 signal (SIGABRT, crash_signal);
1592 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1593 signal (SIGIOT, crash_signal);
1596 signal (SIGFPE, crash_signal);
1599 /* Other host-specific signal setup. */
1600 (*host_hooks.extra_signals)();
1602 /* Initialize the garbage-collector, string pools and tree type hash
1606 linemap_init (&line_table);
1609 /* Initialize register usage now so switches may override. */
1612 /* Register the language-independent parameters. */
1613 add_params (lang_independent_params, LAST_PARAM);
1615 /* This must be done after add_params but before argument processing. */
1616 init_ggc_heuristics();
1617 init_optimization_passes ();
1620 /* Return true if the current target supports -fsection-anchors. */
1623 target_supports_section_anchors_p (void)
1625 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1628 if (targetm.asm_out.output_anchor == NULL)
1634 /* Process the options that have been parsed. */
1636 process_options (void)
1638 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1639 This can happen with incorrect pre-processed input. */
1640 debug_hooks = &do_nothing_debug_hooks;
1642 /* Allow the front end to perform consistency checks and do further
1643 initialization based on the command line options. This hook also
1644 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1645 so we can correctly initialize debug output. */
1646 no_backend = lang_hooks.post_options (&main_input_filename);
1647 #ifndef USE_MAPPED_LOCATION
1648 input_filename = main_input_filename;
1651 #ifdef OVERRIDE_OPTIONS
1652 /* Some machines may reject certain combinations of options. */
1656 if (flag_section_anchors && !target_supports_section_anchors_p ())
1658 warning (OPT_fsection_anchors,
1659 "this target does not support %qs", "-fsection-anchors");
1660 flag_section_anchors = 0;
1663 if (flag_short_enums == 2)
1664 flag_short_enums = targetm.default_short_enums ();
1666 /* Set aux_base_name if not already set. */
1669 else if (main_input_filename)
1671 char *name = xstrdup (lbasename (main_input_filename));
1673 strip_off_ending (name, strlen (name));
1674 aux_base_name = name;
1677 aux_base_name = "gccaux";
1679 /* Set up the align_*_log variables, defaulting them to 1 if they
1680 were still unset. */
1681 if (align_loops <= 0) align_loops = 1;
1682 if (align_loops_max_skip > align_loops || !align_loops)
1683 align_loops_max_skip = align_loops - 1;
1684 align_loops_log = floor_log2 (align_loops * 2 - 1);
1685 if (align_jumps <= 0) align_jumps = 1;
1686 if (align_jumps_max_skip > align_jumps || !align_jumps)
1687 align_jumps_max_skip = align_jumps - 1;
1688 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1689 if (align_labels <= 0) align_labels = 1;
1690 align_labels_log = floor_log2 (align_labels * 2 - 1);
1691 if (align_labels_max_skip > align_labels || !align_labels)
1692 align_labels_max_skip = align_labels - 1;
1693 if (align_functions <= 0) align_functions = 1;
1694 align_functions_log = floor_log2 (align_functions * 2 - 1);
1696 /* Unrolling all loops implies that standard loop unrolling must also
1698 if (flag_unroll_all_loops)
1699 flag_unroll_loops = 1;
1701 /* The loop unrolling code assumes that cse will be run after loop.
1702 web and rename-registers also help when run after loop unrolling. */
1704 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1705 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1706 if (flag_web == AUTODETECT_VALUE)
1707 flag_web = flag_unroll_loops || flag_peel_loops;
1708 if (flag_rename_registers == AUTODETECT_VALUE)
1709 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1711 if (flag_non_call_exceptions)
1712 flag_asynchronous_unwind_tables = 1;
1713 if (flag_asynchronous_unwind_tables)
1714 flag_unwind_tables = 1;
1716 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1718 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1719 flag_unit_at_a_time = 0;
1721 if (!flag_unit_at_a_time)
1722 flag_section_anchors = 0;
1724 if (flag_value_profile_transformations)
1725 flag_profile_values = 1;
1727 /* Warn about options that are not supported on this machine. */
1728 #ifndef INSN_SCHEDULING
1729 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1730 warning (0, "instruction scheduling not supported on this target machine");
1733 if (flag_delayed_branch)
1734 warning (0, "this target machine does not have delayed branches");
1737 user_label_prefix = USER_LABEL_PREFIX;
1738 if (flag_leading_underscore != -1)
1740 /* If the default prefix is more complicated than "" or "_",
1741 issue a warning and ignore this option. */
1742 if (user_label_prefix[0] == 0 ||
1743 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1745 user_label_prefix = flag_leading_underscore ? "_" : "";
1748 warning (0, "-f%sleading-underscore not supported on this target machine",
1749 flag_leading_underscore ? "" : "no-");
1752 /* If we are in verbose mode, write out the version and maybe all the
1753 option flags in use. */
1756 print_version (stderr, "");
1758 print_switch_values (print_to_stderr);
1761 if (flag_syntax_only)
1763 write_symbols = NO_DEBUG;
1767 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1769 if (debug_info_level == DINFO_LEVEL_NONE)
1770 write_symbols = NO_DEBUG;
1772 /* Now we know write_symbols, set up the debug hooks based on it.
1773 By default we do nothing for debug output. */
1774 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1775 default_debug_hooks = &do_nothing_debug_hooks;
1776 #if defined(DBX_DEBUGGING_INFO)
1777 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1778 default_debug_hooks = &dbx_debug_hooks;
1780 #if defined(XCOFF_DEBUGGING_INFO)
1781 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1782 default_debug_hooks = &xcoff_debug_hooks;
1784 #ifdef SDB_DEBUGGING_INFO
1785 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1786 default_debug_hooks = &sdb_debug_hooks;
1788 #ifdef DWARF2_DEBUGGING_INFO
1789 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1790 default_debug_hooks = &dwarf2_debug_hooks;
1792 #ifdef VMS_DEBUGGING_INFO
1793 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1794 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1795 default_debug_hooks = &vmsdbg_debug_hooks;
1798 if (write_symbols == NO_DEBUG)
1800 #if defined(DBX_DEBUGGING_INFO)
1801 else if (write_symbols == DBX_DEBUG)
1802 debug_hooks = &dbx_debug_hooks;
1804 #if defined(XCOFF_DEBUGGING_INFO)
1805 else if (write_symbols == XCOFF_DEBUG)
1806 debug_hooks = &xcoff_debug_hooks;
1808 #ifdef SDB_DEBUGGING_INFO
1809 else if (write_symbols == SDB_DEBUG)
1810 debug_hooks = &sdb_debug_hooks;
1812 #ifdef DWARF2_DEBUGGING_INFO
1813 else if (write_symbols == DWARF2_DEBUG)
1814 debug_hooks = &dwarf2_debug_hooks;
1816 #ifdef VMS_DEBUGGING_INFO
1817 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1818 debug_hooks = &vmsdbg_debug_hooks;
1821 error ("target system does not support the \"%s\" debug format",
1822 debug_type_names[write_symbols]);
1824 /* Now we know which debug output will be used so we can set
1825 flag_var_tracking, flag_rename_registers if the user has
1826 not specified them. */
1827 if (debug_info_level < DINFO_LEVEL_NORMAL
1828 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1830 if (flag_var_tracking == 1)
1832 if (debug_info_level < DINFO_LEVEL_NORMAL)
1833 warning (0, "variable tracking requested, but useless unless "
1834 "producing debug info");
1836 warning (0, "variable tracking requested, but not supported "
1837 "by this debug format");
1839 flag_var_tracking = 0;
1842 if (flag_rename_registers == AUTODETECT_VALUE)
1843 flag_rename_registers = default_debug_hooks->var_location
1844 != do_nothing_debug_hooks.var_location;
1846 if (flag_var_tracking == AUTODETECT_VALUE)
1847 flag_var_tracking = optimize >= 1;
1849 /* If auxiliary info generation is desired, open the output file.
1850 This goes in the same directory as the source file--unlike
1851 all the other output files. */
1852 if (flag_gen_aux_info)
1854 aux_info_file = fopen (aux_info_file_name, "w");
1855 if (aux_info_file == 0)
1856 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1859 if (! targetm.have_named_sections)
1861 if (flag_function_sections)
1863 warning (0, "-ffunction-sections not supported for this target");
1864 flag_function_sections = 0;
1866 if (flag_data_sections)
1868 warning (0, "-fdata-sections not supported for this target");
1869 flag_data_sections = 0;
1873 if (flag_function_sections && profile_flag)
1875 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1876 flag_function_sections = 0;
1879 #ifndef HAVE_prefetch
1880 if (flag_prefetch_loop_arrays)
1882 warning (0, "-fprefetch-loop-arrays not supported for this target");
1883 flag_prefetch_loop_arrays = 0;
1886 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1888 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1889 flag_prefetch_loop_arrays = 0;
1893 /* This combination of options isn't handled for i386 targets and doesn't
1894 make much sense anyway, so don't allow it. */
1895 if (flag_prefetch_loop_arrays && optimize_size)
1897 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1898 flag_prefetch_loop_arrays = 0;
1901 #ifndef OBJECT_FORMAT_ELF
1902 #ifndef OBJECT_FORMAT_MACHO
1903 if (flag_function_sections && write_symbols != NO_DEBUG)
1904 warning (0, "-ffunction-sections may affect debugging on some targets");
1908 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1909 if (flag_signaling_nans)
1910 flag_trapping_math = 1;
1912 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1913 if (flag_cx_limited_range)
1914 flag_complex_method = 0;
1916 /* Targets must be able to place spill slots at lower addresses. If the
1917 target already uses a soft frame pointer, the transition is trivial. */
1918 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1920 warning (0, "-fstack-protector not supported for this target");
1921 flag_stack_protect = 0;
1923 if (!flag_stack_protect)
1924 warn_stack_protect = 0;
1926 /* ??? Unwind info is not correct around the CFG unless either a frame
1927 pointer is present or A_O_A is set. Fixing this requires rewriting
1928 unwind info generation to be aware of the CFG and propagating states
1930 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1931 && flag_omit_frame_pointer)
1933 warning (0, "unwind tables currently requires a frame pointer "
1935 flag_omit_frame_pointer = 0;
1939 /* Initialize the compiler back end. */
1943 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1944 || debug_info_level == DINFO_LEVEL_VERBOSE
1945 #ifdef VMS_DEBUGGING_INFO
1946 /* Enable line number info for traceback. */
1947 || debug_info_level > DINFO_LEVEL_NONE
1949 || flag_test_coverage);
1953 init_fake_stack_mems ();
1956 init_varasm_once ();
1958 /* The following initialization functions need to generate rtl, so
1959 provide a dummy function context for them. */
1960 init_dummy_function_start ();
1962 if (flag_caller_saves)
1963 init_caller_save ();
1964 expand_dummy_function_end ();
1967 /* Language-dependent initialization. Returns nonzero on success. */
1969 lang_dependent_init (const char *name)
1971 location_t save_loc = input_location;
1972 if (dump_base_name == 0)
1973 dump_base_name = name && name[0] ? name : "gccdump";
1975 /* Other front-end initialization. */
1976 #ifdef USE_MAPPED_LOCATION
1977 input_location = BUILTINS_LOCATION;
1979 input_filename = "<built-in>";
1982 if (lang_hooks.init () == 0)
1984 input_location = save_loc;
1986 init_asm_output (name);
1988 /* These create various _DECL nodes, so need to be called after the
1989 front end is initialized. */
1993 /* The following initialization functions need to generate rtl, so
1994 provide a dummy function context for them. */
1995 init_dummy_function_start ();
1997 expand_dummy_function_end ();
1999 /* If dbx symbol table desired, initialize writing it and output the
2000 predefined types. */
2001 timevar_push (TV_SYMOUT);
2003 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2004 if (dwarf2out_do_frame ())
2005 dwarf2out_frame_init ();
2008 /* Now we have the correct original filename, we can initialize
2010 (*debug_hooks->init) (name);
2012 timevar_pop (TV_SYMOUT);
2017 /* Clean up: close opened files, etc. */
2022 /* Close the dump files. */
2023 if (flag_gen_aux_info)
2025 fclose (aux_info_file);
2027 unlink (aux_info_file_name);
2030 /* Close non-debugging input and output files. Take special care to note
2031 whether fclose returns an error, since the pages might still be on the
2032 buffer chain while the file is open. */
2036 if (ferror (asm_out_file) != 0)
2037 fatal_error ("error writing to %s: %m", asm_file_name);
2038 if (fclose (asm_out_file) != 0)
2039 fatal_error ("error closing %s: %m", asm_file_name);
2042 finish_optimization_passes ();
2046 ggc_print_statistics ();
2047 stringpool_statistics ();
2048 dump_tree_statistics ();
2049 dump_rtx_statistics ();
2050 dump_varray_statistics ();
2051 dump_alloc_pool_statistics ();
2052 dump_bitmap_statistics ();
2053 dump_ggc_loc_statistics ();
2056 /* Free up memory for the benefit of leak detectors. */
2059 /* Language-specific end of compilation actions. */
2060 lang_hooks.finish ();
2063 /* Initialize the compiler, and compile the input file. */
2067 /* Initialize timing first. The C front ends read the main file in
2068 the post_options hook, and C++ does file timings. */
2069 if (time_report || !quiet_flag || flag_detailed_statistics)
2071 timevar_start (TV_TOTAL);
2075 /* Don't do any more if an error has already occurred. */
2078 /* This must be run always, because it is needed to compute the FP
2079 predefined macros, such as __LDBL_MAX__, for targets using non
2080 default FP formats. */
2081 init_adjust_machine_modes ();
2083 /* Set up the back-end if requested. */
2087 /* Language-dependent initialization. Returns true on success. */
2088 if (lang_dependent_init (main_input_filename))
2094 /* Stop timing and print the times. */
2095 timevar_stop (TV_TOTAL);
2096 timevar_print (stderr);
2099 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2100 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2101 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2103 It is not safe to call this function more than once. */
2106 toplev_main (unsigned int argc, const char **argv)
2110 /* Initialization of GCC's environment, and diagnostics. */
2111 general_init (argv[0]);
2113 /* Parse the options and do minimal processing; basically just
2114 enough to default flags appropriately. */
2115 decode_options (argc, argv);
2119 /* Exit early if we can (e.g. -help). */
2120 if (!exit_after_options)
2123 if (errorcount || sorrycount)
2124 return (FATAL_EXIT_CODE);
2126 return (SUCCESS_EXIT_CODE);